期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 161, 期 1, 页码 594-599出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2011.11.006
关键词
CuO nanorods; Gas sensor; Pd-functionalization; H2S gas
资金
- Korea Science and Engineering Foundation through National Research Lab
- National Research Foundation of Korea [2007-0056622] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
CuO one-dimensional nanostructures functionalized with Pd were synthesized using a three-step process: thermal oxidation of Cu foil in air, dipping in a PdCl2 solution, and thermal annealing. The gas sensors fabricated from the multiple net worked Pd-functionalized CuO nanorods showed substantially enhanced electrical responses to H2S at 300 degrees C. The multiple networked CuO nanorod sensors showed a response of 400% at 100 ppm H2S at 300 degrees C, whereas the Pd-functionalized CuO nanorod sensors showed a response of 31,243% under the same conditions. The recovery time of the Pd-functionalized nanorod sensor is 5-8 times shorter than that of the bare-CuO nanorod, whereas the response time of the former was 2-3 times longer than that of the latter. In addition, the H2S gas sensing mechanism was examined, and the origin of the enhancement of the H2S gas sensing properties of the CuO nanorods by functionalization with Pd is discussed. (C) 2011 Elsevier B.V. All rights reserved.
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